Did you read your own citation? according to the first source you posted:
"Some advice floating about on the web says that you “might as well keep your lights on 24/0 for vegetation”, arguing that the extra light can’t hurt. This may be true, when growing feminized seeds, but it also happens that a lot more light leads to a lot more males if you are growing from standard seeds."
They are clearly stating that 24/0 will lead to more males. I didn't bother to look up the second one as I know what you said about 18/6 leading to more males is simply false.
Please stop spreading disinformation. Good Day Sir!!!!
PS I am a little leery of your source as they claim that 24/0 may be OK for feminized seeds. Not true. All plants need to have some break in the light cycle for proper carbohydrate production to take place. This is known as the Calvin Cycle and it is disrupted by constant light. Please read an actual biology book and take the time to comprehend the information. Thank you, Larry
